projects / fio.git / blame
| Commit | Line | Data |
|---|---|---|
| 2866c82d JA |
1 | /* |
| 2 | * regular read/write sync io engine | |
| 3 | * | |
| 4 | */ | |
| 5 | #include <stdio.h> | |
| 6 | #include <stdlib.h> | |
| 7 | #include <unistd.h> | |
| 8 | #include <errno.h> | |
| 9 | #include <assert.h> | |
| 10 | #include <sys/mman.h> | |
| 5f350952 JA |
11 | |
| 12 | #include "../fio.h" | |
| 13 | #include "../os.h" | |
| 2866c82d | 14 | |
| 2866c82d JA |
15 | static int fio_mmapio_queue(struct thread_data *td, struct io_u *io_u) |
| 16 | { | |
| 53cdc686 JA |
17 | struct fio_file *f = io_u->file; |
| 18 | unsigned long long real_off = io_u->offset - f->file_offset; | |
| 2866c82d JA |
19 | |
| 20 | if (io_u->ddir == DDIR_READ) | |
| cec6b55d | 21 | memcpy(io_u->xfer_buf, f->mmap + real_off, io_u->xfer_buflen); |
| 87dc1ab1 | 22 | else if (io_u->ddir == DDIR_WRITE) |
| cec6b55d | 23 | memcpy(f->mmap + real_off, io_u->xfer_buf, io_u->xfer_buflen); |
| b907a5b5 JA |
24 | else if (io_u->ddir == DDIR_SYNC) { |
| 25 | if (msync(f->mmap, f->file_size, MS_SYNC)) | |
| 26 | io_u->error = errno; | |
| 27 | } | |
| 2866c82d JA |
28 | |
| 29 | /* | |
| 30 | * not really direct, but should drop the pages from the cache | |
| 31 | */ | |
| b907a5b5 | 32 | if (td->odirect && io_u->ddir != DDIR_SYNC) { |
| cec6b55d | 33 | if (msync(f->mmap + real_off, io_u->xfer_buflen, MS_SYNC) < 0) |
| 2866c82d | 34 | io_u->error = errno; |
| cec6b55d | 35 | if (madvise(f->mmap + real_off, io_u->xfer_buflen, MADV_DONTNEED) < 0) |
| 2866c82d JA |
36 | io_u->error = errno; |
| 37 | } | |
| 38 | ||
| 36167d82 | 39 | if (io_u->error) |
| e1161c32 | 40 | td_verror(td, io_u->error, "sync"); |
| 2866c82d | 41 | |
| 36167d82 | 42 | return FIO_Q_COMPLETED; |
| 2866c82d JA |
43 | } |
| 44 | ||
| 948f9b2e JA |
45 | static int fio_mmapio_init(struct thread_data *td) |
| 46 | { | |
| 47 | struct fio_file *f; | |
| 48 | int i; | |
| 49 | ||
| 413dd459 | 50 | if (!td_write(td)) |
| 948f9b2e JA |
51 | return 0; |
| 52 | ||
| 53 | /* | |
| 54 | * We need to truncate the files to the right size, if | |
| 55 | * we are writing to it. | |
| 56 | */ | |
| 57 | for_each_file(td, f, i) { | |
| 58 | if (ftruncate(f->fd, f->file_size) < 0) { | |
| e1161c32 | 59 | td_verror(td, errno, "ftruncate"); |
| 948f9b2e JA |
60 | return 1; |
| 61 | } | |
| 62 | } | |
| 63 | ||
| 64 | return 0; | |
| 65 | } | |
| 66 | ||
| b5af8293 JA |
67 | static int fio_mmapio_open(struct thread_data *td, struct fio_file *f) |
| 68 | { | |
| 69 | int ret, flags; | |
| 70 | ||
| 71 | ret = generic_open_file(td, f); | |
| 72 | if (ret) | |
| 73 | return ret; | |
| 74 | ||
| 75 | if (td_rw(td)) | |
| 76 | flags = PROT_READ | PROT_WRITE; | |
| 77 | else if (td_write(td)) { | |
| 78 | flags = PROT_WRITE; | |
| 79 | ||
| 80 | if (td->verify != VERIFY_NONE) | |
| 81 | flags |= PROT_READ; | |
| 82 | } else | |
| 83 | flags = PROT_READ; | |
| 84 | ||
| 85 | f->mmap = mmap(NULL, f->file_size, flags, MAP_SHARED, f->fd, f->file_offset); | |
| 86 | if (f->mmap == MAP_FAILED) { | |
| 87 | f->mmap = NULL; | |
| 88 | td_verror(td, errno, "mmap"); | |
| 89 | goto err; | |
| 90 | } | |
| 91 | ||
| 92 | if (file_invalidate_cache(td, f)) | |
| 93 | goto err; | |
| 94 | ||
| 95 | if (!td_random(td)) { | |
| 96 | if (madvise(f->mmap, f->file_size, MADV_SEQUENTIAL) < 0) { | |
| 97 | td_verror(td, errno, "madvise"); | |
| 98 | goto err; | |
| 99 | } | |
| 100 | } else { | |
| 101 | if (madvise(f->mmap, f->file_size, MADV_RANDOM) < 0) { | |
| 102 | td_verror(td, errno, "madvise"); | |
| 103 | goto err; | |
| 104 | } | |
| 105 | } | |
| 106 | ||
| 107 | return 0; | |
| 108 | ||
| 109 | err: | |
| 110 | if (f->mmap) | |
| 111 | munmap(f->mmap, f->file_size); | |
| 112 | generic_close_file(td, f); | |
| 113 | return 1; | |
| 114 | } | |
| 115 | ||
| 116 | static void fio_mmapio_close(struct thread_data fio_unused *td, | |
| 117 | struct fio_file *f) | |
| 118 | { | |
| 119 | if (f->mmap) { | |
| 120 | munmap(f->mmap, f->file_size); | |
| 121 | f->mmap = NULL; | |
| 122 | } | |
| 123 | } | |
| 124 | ||
| 5f350952 | 125 | static struct ioengine_ops ioengine = { |
| 2866c82d JA |
126 | .name = "mmap", |
| 127 | .version = FIO_IOOPS_VERSION, | |
| 2866c82d | 128 | .queue = fio_mmapio_queue, |
| 948f9b2e | 129 | .init = fio_mmapio_init, |
| b5af8293 JA |
130 | .open_file = fio_mmapio_open, |
| 131 | .close_file = fio_mmapio_close, | |
| 132 | .flags = FIO_SYNCIO, | |
| 2866c82d | 133 | }; |
| 5f350952 JA |
134 | |
| 135 | static void fio_init fio_mmapio_register(void) | |
| 136 | { | |
| 137 | register_ioengine(&ioengine); | |
| 138 | } | |
| 139 | ||
| 140 | static void fio_exit fio_mmapio_unregister(void) | |
| 141 | { | |
| 142 | unregister_ioengine(&ioengine); | |
| 143 | } |